Hi Carla,
does it not say anything else on your screen? just the above?
have you lately changed something in your hardware. Does it occur when you play a certain game or do anything specific? it seems that often the drivers of the videocard or the memory generates this message, however, it seems to be able to come from whatever component in your computer. it may be wise to install the latest drivers for your videocard and/or run a memtest (which takes many hours).
you might want to give Microsoft help &support a visit, type in your line and choose the OS, there will be many hits, but maybe it brings you the solution you need.
greetings,
Ben
............................................................................................Everybody talks about how much I drink but nobody talks about my thirst